Draft a minimal Windows VNC viewer from a brief

They asked Claude to build a tiny Windows 10 VNC client from an email spec, but after a week it still did not work.

Done with ClaudeChatGPT· Advanced· Aug 2026

What they did
The person emailed Claude a short specification for a stripped-down x64 VNC viewer on Windows 10. It had to reach localhost:5921 through an SSH tunnel, display only the remote pointer, and use the highest quality setting on a gigabit LAN. Claude was supposed to compile it on a Mac in Rust or C++, then share the binary, a SHA-256 checksum, and a PowerShell command for checking it.
How it went
The attempt did not succeed. Claude kept returning unusable builds, exhausted the full 20x Max weekly limit, and was still sending broken code even after the reset three days later. The person shut down the project after roughly a week.
Tips
For a client that speaks a specific protocol, expect several repair cycles and decide in advance when to stop. Only ask for the checksum and verification command once the executable actually runs.

Try it yourself with Claude Code

Create a very small [app type] for [target OS and version] that reaches [host and port] only through [tunnel or proxy details]. I’m developing on [my OS], so use cross-compilation if needed and avoid unnecessary dependencies. First outline the build plan and wait for my approval before anything irreversible, such as submitting, deleting, or releasing files. When the build is finished, provide the executable, its SHA-256 checksum, and the exact command to verify it.

Fill in the [brackets]. Agents can make mistakes, so review anything before it is sent, paid or deleted.

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